#!/usr/bin/env python

"""
convert between types
"""

import argparse
import sys
from .read import read_csv, CSVParser

__all__ = ['cast', 'float_or_orig', 'main']

default_cast = (int, float, str)

def cast(to_type, *values):

    retval = []
    for value in values:
        try:
            retval.append(to_type(value))
        except ValueError:
            retval.append(value)
    return retval


def float_or_orig(*values):
    return cast([float], *values)


def column_type(values, types=default_cast):
    """determine the type of a column"""
    raise NotImplementedError('TODO') # -> record TODO items

def cast_column(values, to=default_cast):
    """
    cast a column of data
    """
    raise NotImplementedError('TODO') # -> record TODO items

def main(args=sys.argv[1:]):
    """CLI"""

    # parse command line
    parser = CSVParser(description="interpolate types from file")
    options = parser.parse_args(args)

    # read CSV file
    data = parser.read()

    import pdb; pdb.set_trace()

    # print type information
    raise NotImplementedError('TODO') # -> record TODO items

if __name__ == '__main__':
    main()